jerryc41 Loc: Catskill Mts of NY

Removing and re-seating computer cards has gotten my machines going more than once. The last time was just a few minutes ago. I'm on an old (2008) former Vista Dell desktop. When I turned it on, the monitor was black, and it showed no connection to the computer - amber light instead of green. I removed and replaced the video card, and it booted right away.

Re-seating memory cards can also solve random problems.

Powerstroke2010

On this same issue, I've had the odd issue either when putting an SD card into my camera, or the same card into my MacBook Pro laptop. I often wonder if the 'contacts' on the card, could use a cleaning...and if so, is there something in particular one should use for cleaning these contacts? My camera has a two card insert, of which I use the top with a 128 GB for RAW and the second lower card is a 64 GB card for my .jpg's. I'm obviously taking them in and out regularly, so I'm thinking a cleaning of the contacts may be needed?

Marionsho Loc: Kansas

Just wipe them with a microfiber towel until they're shiny. Ovoid the chemicals at first, and resort to something later, if needed.
Marion

dcampbell52 Loc: Clearwater Fl

Also, Don't use a pencil or other type of eraser as it is too abrasive and will damage the circuit board. A cloth dampened with rubbing alcohol generally works fine.

jmvaugh Loc: Albuquerque

If the microfiber cloth doesn't work you should be able to try gently wiping the contacts with an alcohol swab. I keep a few tucked in my bag and my first aid kit. When my Fitbit band wouldn't start recharging, the tech suggested using the alcohol swab on the charger contacts and the Fitbit contacts. It worked great. Good luck!